Sewing-machine



(No Model.)

0. LENZ.

SEWING MACHINE. vN0. 320,666. PatentedJune 2 3, 1885.

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UNITED STATES PATENT OFFICE.

CHARLOTTE LENZ, OF CLEVELAND, OHIO.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 320,666, dated June 23, 1885,

Application filed October 6, 1884. (No model.)

To all whom it may concern.-

Be it known that I, CHARLOTTE LENZ, of Cleveland, in the county of Guyahoga and State of Ohio, have invented certain useful and new Improvements in Sewing-Machines, which relate to the means employed for properly and readily fixing attachments to the pressure-bar.

It is well known to those using sewing-machines that to fix attachments to the presserbar by the means usually employed for that purpose-viz., a set-screw the point of the screw by frequent use so indents and otherwise injures the bar as to make it a matter of much trouble to secure an attachment to the bar in proper position for work, itbeing quite liable to be moved more or less out of place by the screw as the point thereof slips in consequence of the indentations and roughness made in the bar by the point of the screw. To

avoid the abovesaid trouble, and provide a guide for an exact adjustment of the attachment to the bar and for securingthe same thereto, is the purpose of the improvement above alluded to.

The invention will be more fully explained in the following specifications in connection with the annexed drawings, making part of the same, in which- Figure l is a view of ahead-plate, pressurebar,and the improvement attached imposition. Fig. 2 represents a view from the rear of the pressure-bar, showing the improvement connected thereto. Figs. 3 and 4 are simply modified forms of Fig. 1.

The improvement herein set forth is not con fined to any special sewing-machine, but is adapted to all having a pressure-bar, as shown, or the equivalent thereof, to which sewing attachments may be secured.

In the drawings like letters denote like parts.

In the drawings, A represents a portion of a head-plate connected with the arm of a sewing-machine, and B, Fig. 1, the pressure-bar in place in the head-plate, having at the lower end an attachment, 0, which, however, maybe readily removed and any other of the usual attachments used in sewing substituted, and to which attachments the described improvement may be applied.

In the lower end of the pressure-bar is fitted a thumb-screw, D, and in the collar E of the. attachment or pressure-foot F, Figs. 3 and 4, is cut' a slot, G, Figs. 2 and 4, which receives the shank of the thumbscrew with the head on the outside, as seen in Figs. 1 and 3; hence the force of the screw in the end of the pressure-bar will hold the device securely and in correct position on the pressure-bar. In this way all of the attachments attached for various uses to the end of the pressurebar may be quickly, uniformly, and correctly secured without the usual delay required in adjusting and trying preparatory to using it, as in the usual way.

. As the bores of the collars vary in diameter,

' and also the lower ends of the pressure-bars,

to compensate for this variation I attach to the side of the collar a movable plate, H, by means of set-screw I, Fig. 1. which passes through the slot J in the plate and into the collar, thereby fastening the adjustable plate on the said collar, there being a slot, K, in the plate which is in open relation with the slot Gin the collar, as indicated at G, Fig. 2, which is designed to represent both the slot K of the plate and the slot G of the collar, arranged in open relation to each other. The slot in the plate, however, is a little wider than the slot in the collar, for the purpose of allowing the plate H to be moved or turned horizontally on the collar, of the slot. The elongated slot J, admits of this movement, and when adjusted the setscrew Iwill fasten it in positionupon the collar.

so as to enlarge or contract the width It will be noted that when the set-screw I is loosened, and also theLthumb-screw D, the device 0 may be turned upon the end of the pressure-bar in either direction horizontally, and also the plate H. By this means the attachments may be moved around on the pressure-bar and adjusted to the exact position for performing the required work. Then by tightening the screw Ithe two slots will coincide in their relation to the shank of the thumb-screw and the proper position of the bar for efi'ective work.

An attachment is fastened to the said pressure-bar by means of the thumbscrew, and when the attachment is once adjusted by means of the movable plate H and set-screw I, Figs. 1 and 2, it will be at all times in correct and proper position for work by simply putting it on the end of the bar and fastening it thereon with the thumb-screw.

This improvement avoids the use and cost of a thumb-screw in every attachment to be secured to the pressure-bar, and, as before stated, the abrasion and indentation of the lower part of the pressure-bar by the end of the thumb-screw being forced into it, more or less, is avoided. The thumb-screw being, as shown, threaded into the lower part of the pressure-bar, admits of an easy and ready adjustment of the attachments, as represented in the drawings. 7

WVhat I claim, and for which Letters Patent are solicited, is

The combination,witha sewing-machine attachment adapted to be attached to the presserbar by means of a collar and set-screw, of the plate H, provided with the slots J and K,and the set-screw I, whereby said plate is adjustably secured to the collar of the attachment, for the purpose set forth.

In testimony whereofIaffiX my signature in presence of two Witnesses.

CHARLOTTE LEN Z.

Witnesses:

HENRY GENTZ, B. DEMMING. 

